Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
tranh thai » trang thai, tran thi, tinh thai
hoc thieu » toc thieu, hoc hien
vung cong » vung dong, vung song, vung tong
dung cong » dung trong
tac toan » tap toan, tam toan, hach toan
toan ban » van ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu xanh - canh tranh thai ((vung cong) OR (dung cong)) tac toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - canh tranh thai ((vung cong) OR (dung cong)) tac toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh tranh thai ((vung cong) OR (dung cong)) tac toan ban*.